Made mistake & did not label connection - Printable Version
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Made mistake & did not label connection - georgetownjohn - 11-28-2024
Happy Thanksgiving all!
I have made a real bonehead mistake this time. Hope someone can help. I am trying to determine where this wire in question will connect bak to when I reistall the RF unit. I had numbered it but forgot to note where I removed it from. As you'll see from the 2 attched photos(the best I could do), the wire in question is connected to pin 8 of the 6A8G and that pin is also strapped to pins 7 and 8. That wire is hard to see but it is yellow and at the very top right hand corner. While I am still a novice, I determine pin 8 as the first pin to the right of the keyway counting clockwise as viewed from the bottom. Unfortunately, I am just not sharp enough yest to determine where that wire should connect to in the chassis. It almost looks like it should go to a ground point but I am not sure.
RE: Made mistake & did not label connection - RodB - 11-28-2024
You haven't given us the model number of the set so I looked up the 6A8 pin assignment. Pin 8 is the cathode and pin 7 is a filament connection. Check your schematic and you'll probably find the cathode is grounded and so is one side of the filament.
RE: Made mistake & did not label connection - georgetownjohn - 11-28-2024
Sorry, it is a Philco 37-640. Does that help?--John
RE: Made mistake & did not label connection - radiorich - 11-28-2024
Hello John,
I have been there either label got lost or was not labeled !
Sincerely Richard
RE: Made mistake & did not label connection - georgetownjohn - 11-28-2024
What does the dotted line representing that surrounds the tube in the schematic?
RE: Made mistake & did not label connection - RodB - 11-28-2024
I was correct with the 6A8 pin connection's, 7 and 8 are connected to ground as well as the tube shield (the broken line surrounding the tube in the schematic). If the 6A8 is a metal tube then pin 1 Wil be connected to the metal shield and should also be grounded.